Battery charger seems to be working...

The battery charger is reading between 14.1 and 14.4 volts output when not connected to a battery. That seems to just leave the battery as the problem. The charger is a West Marine WC40 with a two battery bank capacity. The deep cycle batteries are about as old as I am...not quite but clearly it’s time for them to go and the bulging clearly is not a good sign. I bought a starting battery last month and upgraded it today to a 1,000 CCA West marine lead acid starting battery. Mainly I just need a something to get the engine up as running and then once the boat is in the water I’ll add new house bank batteries. It seems that I have all my pieces together and I’m ready for that big step. Friday might be the big day to fire the engine up for the first time in a long time..